The act of, when heavily drinking (usually hard alcohol) and having a good time at night to, without warning, suddenly be in your bed the next morning, wondering how it was that you got there so fast, as though you had stepped through a time machine. Most likely to be accompanied by a drunk hookup in your bed the following morning.

It's too bad that I time machined last night, because there was a cute looking girl in my bed when I stepped out.